Resurfacing device



H. H. EATON.

RESURFACING DEVICE.

APPLICATION FILED AUG- I3. 1915.

'1 ,329Q383. Patented Feb. 3, 1920.

I -mmum UNITED STATES PATENT OFFICE.

HARRISON H. EATON, 013 BEVERLY, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

RESURFACING DEVICE.

Patented Feb. 3, 1920.

Application filed August 13, 1915. Serial No. 45,416.

. fl '0 all whom it may concern:

Be it known that I, HARRISON H. EAjroN, a citizen of the United States, residlng at Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Resurfacing Devices, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to devices for use in formin smooth surfaces upon articles of wood or like material; and a particular object of the invention is to provide an improved device of this character adapted for use in planing the working surfaces of the cutting blocks of die cutting machines, such, for example, as the so-called clicking machine which is used extensively for dieing out uppers in the manufacture of boots and shoes.

These blocks are subject to considerable wear through contact with the cutting edges of the dies, and since it is essential for the best results that the block shall present a comparatively smooth working surface, frequent resurfacing of the block is necessary.

Such blocks, however, are usually made of hard and resistant material, and when made of wood have a working surface which is transverse to the grain of the wood. For this reason it has been found very diflicult to resurface a block by the use of hand tools or while the block is in place in the machine, and it has been a common practice to remove the block entirely from the cutting machine and resurface it in aplaning machine espe- ,cially provided for the purpose.

An important object of this invention is to avoid the loss of time spent in removing and replacing the cutting blocks of die cutting machines, as well as a large part of the.

oxpense of planing machines such as have been frequently requiredheretofore for resurfacing the blocks, and to provide a resurfacing device of relatively inexpensive character which may: be used to plane the working surface of a cutting block while the block is in place in the machine.

It is, moreover, a well known fact that in the operation of a clicking machine, constructed as shown, for example. in the United States Patent t'o Bates, No. 921,503,

granted May 11, 1909, thepresser member,

which projects forwardly over the block.

among which are the wear of the post in its bearings, the inertia of the presser member,

and the tendency of the -frame and other portions of the machine, however stronglyv constructed, to spring slightly upon an operating stroke of the presser member. With the object of remedying this difficulty it is frequently the practice to raise slightly the front portion of the block so that the cutting surface of theblock may slope toward the rear; but even with this arrangement the best'results 'may not be secured when the presser member is swung so as to project toward the side of the block. Maximum efliciency under all conditions would require a gradual slope of the cutting surface of the block, not only from the front but also from both sides toward that portion of the block which is in the vicinit of the post. Such a result it is not possib e to obtain by means of planing'machines such as are frequently used for resurfacing cuttingblocks, nor have hand manipulated tools such as heretofore devised been found entirely racticable for use in forming a cutting sur ace ofthe desired contour. Itis accordingly a further important object of this invention to provide a resurfacing device which may be readily manipulated and controlled to vary as desired the contour of the surface of a cutting block.

To the above and other ends an important feature of the invention consists in a novel organization of mechanism arranged to provide a device which may be moved by hand over the surface of the work and including a power driven tool constructed and arranged for effective operation upon the work with the expenditure of but little power and for convenient control to vary its effective engagement with the work.

The above and other features of the invention, including certain details of connow be described with reference to the accompanying drawings, which illustrate a preferred embodiment of theinvention, an

' will be pointed out in. the claims. v

- alternative form of cutting memberto the operating tool;

Fig. 6 is a section through a portion of p the tool, illustrating in greater detail the preferred form of cutting member shown in Fig. 4, and

Fig. 7 is a fragmentary view illustrating the attachment of the waste receptacle to other portions of the device.

The device includes a supporting member or base 2 having a lower, plane work engaging face of extended area for guiding the device in its movements over the surface of the work, and a handle 4 whereby the device may be 'manlpulated, Secured to the member 2 is a standard 6 upon which may 1 be mounted, as shown, an electric motor 8 with the motor shaft 10 extendin downwardly in substantially perpendicu ar relation to the plane of the work engaging face of the member 2, a plate 12 on the standard providing a lower bearing. for the shaft.

The motor may be of any suitable size or type, and is to be supplied with current from any convenient source through a flexible conduit 14.

The member 2 is provided in its work engaging face with a substantially circular opening in the form of a recess 16 in which is mounted for rotation in a plane substan-' tially parallel to the plane of said face a tool 18 having oppositely extending arms 20 and 22 formed respectively to carry different types of cutters or the like for operating upon the surface of the work. Preferabl only one cutter will be used at a time, an the form which has been found most generally satisfactory in use is illustrated in Figs. 4 and 6 and comprises a circular-disk 24 having a peripheral cutting edge and substantially frusto-conical in shape. This cutter is detachably and adjustably mounted upon a pin 26 at the forward end of a recess 28 cut in the lower face of the arm 20, the recess conforming to theshape 'of the upper face of the cutter, and the recess and the pin cooperating to position the cutter in a plane oblique to the plane of rotation of the tool with the edge of the cutter projecting downwardly and forwardly from the front side of the arm 20. A clamp member 30 secured in the recess 28 by means of a screw 32 serves to maintain the cutter securely in place, and upon loosening the screw the cutter may be turned to bring different portions of its cutting edge into working position. I

he form of cutter shown in Figs. 4 and 6 has been found particularlysatisfactory in operation upon the hard and resistant material of the cutting blocks of die cutting machines, since by reason of the curved edge of the cutter it makes, for the most part, a'shearing out which is especially advantageous in cutting across the gram of wood and contributes materially to the formation of a smooth finished surface. This cutter, moreover, is readily adjustable,

so thatwhenone portion of its cutting edge has become dull, another portion may be brought quickly into operative position.

In Fig. 5 is shown a different form of cutter which may be used, if desired, instead of the cutter 24. This cutter is adapted to be secured to the arm 22 of the tool and comprises a plate 34 from which project a pair of saw teeth 36. Since these teeth are alined-in the direction of me out and since they present a smaller extent of operative engagement with the work than a cutter such as 24, it will be apparent that less power will be required to drive the tool when this form of cutter is in use. For this reason a cutter of the form shown in Fig. 5 may be found preferable under certain conditions. Under most conditions, however, the cutter 2.4 will be preferred, particularly'because of the smoothness of its out and its ready adjustability. The cutter mechanism disclosed in Figs. 4 and 6 is not claimed herein but is made the subject matter of a divisional application, Serial No. 328,014, filed October 2, 1919.

The means whereby the tool 18 is mounted to be driven from the shaft 10 comprises a sleeve 38 on the tool encircling the end portion of the shaft and splined to the shaft by a key 40. Threaded upon the upper end of the sleeve are a pair of nuts 42, and loosely encircling the sleeve between these nuts and a ball bearing 44 is a collar 46 having pins 48 that project from its opposite sides through vertical slots50 formed in a substantially cylindrical portion 52 of the member 2,. which embraces the collar 46. The pins 48 are supported in the forked-end-of a lever 54 which is pivoted on the member '52 at 56 and extends rearwardly toward the handle 4. The lever 54 thus serves to support the collar 46 anr through.the collar the tool 18, and forms a portion of the adjusting means for the tool whereby the tool is raised or lowered to varythe extent of projection of the cutter toward the work. A spring 58 mounted in a socket in the standard 6 re sses upon the lever 54 and tends normal y to elevate the tool out of contact with the work. In order to enable the operator to control readily the extent of proection of the tool toward the work in accordance with differences in Operating conditions and to vary the depth of the cut, a lever 60 is. pivoted adjacent to the handle 4 and has an arm 62 projecting under the rear end of the lever 54, so that by pressure upon the lever 60 while manipulating the device by the handle the operator may variably control theefl'ect of the tool upon the work.

The construction shown is particularly elfective in positively pressing the tool against the work, the arm 62 of the lever 60 being so arranged as to exert a crowding action u on the extremity of the lever 54 which ena les the operator to control the tool much more efficiently than is possible with previously existing constructions. An adjustable stop 64 serves by engagement with the lever 54 to limit the depression of the tool. This stop s not an ordinary set screw but is a member provided with a knurled head so" over closely adjacent areas. It is important,

therefore, that the adjustable stop 64 be accesslble and readily operable to enable the operator to control positively the projection of the cutter disk when the conditions call for relatively frequent and prompt adjustments of the cutting means. In case a given surface is to be cut down a predetermined uniform amount the adjustable stop 64 may be secured fixedly in desired position by the clamping efiect produced by turning the screw 64 in the proper direction.

In order that the tool may operate effectively, it is necessary to revent the waste material detached from t e surface of the work from accumulating in the recess 16.

. To this end the recess is provided with a tangential outlet seen at 66, Fig. 3, and in the operation of the tool the arms 20 and 22 serve as fans to create in the recess 16 an a1r current which escapes through the outlet 66 and carries the waste material with it. Air is admitted to the recess on the side opposite to the work through openings 68 in the member 52. For the purpose of increasing the force of the air current, the tool 18 carries between the arms 20 and 22 additional fan blades 70.

In order to prevent the waste material from accumulating upon the surface of the work or from flying about the room, the device is provided with a receptacle 72, and a conduit 74 leads from the outlet 68 to this receptacle. The receptacle is preferably formed as a sheet metal box, and is provided in its top with a large number of openings 76 of sufficient size to permit the escape of air but small enough substantially to prevent the escape of the Waste particles. The receptacle 72 is so mounted as to be retained securely in position during the operation of the device, and at the same time to be readily detachable to permit it to be emptied. For this purpose one end of the receptacle is provided with an opening 78'to receive the delivery end of the conduit 74 which is spaced slightly from the member 2, and near its other end the receptacle is provided with a lug 80 whichhooks over a flange at the sideof the member 2. In order to detach the receptacle it'is therefore necessary only to raise its rearend and slide it rearwardly to disengage it from the conduit 74. It may then beemptied by removing its cover 82.

To facilitate the manipulation of the device, a second handle 84 is provided, this handle projecting laterally from the side of the standard 6 adjacent to the motor 8.

' In the light of the preceding description, a detailed explanation of the operation of the device will be unnecessary. The conduit 14 having been connected to any convenient source of electrical current and the current turnedon, the tool is continuously driven, and the device is moved by the operator slowly over the-work in any desired direction to cause it to operate upon the surface to be finished. The extent of engagement of the cutter with the work is controlled at will by pressure upon the lever 60 and by such control the tool'may be caused, if desired, to cut progressively deeper during a forward movement of the device. Before retracting the device at the end of a forward movement the lever 60 may be released, if

desired, to permit the tool to. be withdrawn The arrangement whereby the tool, is

caused to rotate in a plane substantially parallel to the surface of the work contributes materially, as will be evident, to simplicity of construction of the device and convenience of control of the tool while permitting the tool to be driven'directly from the motor shaft. This arrangement also has the additional advantage, especially in a de-' vice for use in resurfacing cutting blocks,

. that the tool is caused to cut directly across the grain of the wood. This contributes matcrially to the effectiveness of the tool and rid claim'as new and desire to secure by Letters Patent'of the United States is 1. A device of the class described comprising, in combination, a supporting member having a plane work engaging face to guide the device in movements over the work and an opening in said face, a motor mounted on said member and having a shaft;

extending in substantially perpendicular relation to the plane'of said face, a tool in saidopening splined on the motor shaft to be freely slidable longitudinally of the shaft, a member arranged to support the tool, means arranged to engage the member for enabling the operator to press down the tool progressively as he moves the device over the work, and means controllable during operation of the tool to determine positively the extent of maximum depression of the tool during operation thereof.

2. A device of the class described comprising, in combination, a supporting member having a work engaging face to guide movement over the the device by sliding work and an opening in said face, a substantially upright handle on said member for' use in moving the device over the work, a cutting tool mounted for rotation. in said opening, means to determine adjustably the han le, means for. elevating the -tool normall above the plane of said face, and con trolling means connected'to the tool and extending to a osition in front of said handle to be graspe with the handle to enable the operator to force the tool beyond said face and thereby vary the depth of the cut during movement of the device over the work. 3. A device of the class described comprising, in combination, a supporting member having awork engaging face to guide the device in movements over the work, a

cutting tool mounted. slidably on said mem-v ber for rotation in a plane substantially parallel to the plane of said face, a lever mounted on said member and arranged to support the tool, resilient means arranged to operate upon said lever to elevate the tool, means for operating said lever to depress the tool, and a stop controllable while the tool is in operation for limiting adjustably the extent of depression of the tool.

4.'-A device of the class described comprising, in combination, a supporting member having a work engaging face to guide the device in movements over the work, a handle on said member for use in movin the device over the Work, 'acutting too mounted on said member for rotation in a plane substantially parallel to the plane of said work engaging face, a lever mounted on the member and arranged to support the tool, and a second lever arranged to exert a crowdin action upon said first named lever positive y to depress the tool and hold it firmly in contact with the work. I

In testimony whereof I have signed my name to this specification.

- HARRISON H. EATON. 

